0.89×0.48+0.89×0.52 0.25×13.7×0.4 4.2×101
3.6×99 2.5×32×1.25 0.125×88
56.5×99+56.5 (1.25-0.125)×8 45÷0.09÷0.5
17.8÷(1.78×4)
分析:完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的方法進(jìn)行簡(jiǎn)算.
解答:解:0.89×4.8+0.89×0.52
=(0.48+0.52)×0.89,
=1×0.89,
=0.89;

0.25×13.7×0.4
=0.25×0.4×13.7,
=0.1×13.7,
=1.37;

4.2×101
=4.2×100+4.2,
=420+4.2,
=424.2;

3.6×99
=3.6×100-3.6,
=360-3.6,
=356.4;

2.5×32×1.25
=(2.5×4)×(1.25×8),
=10×10,
=100;

0.125×88
=0.125×8×11,
=1×11,
=11;

56.5×99+56.5
=(99+1)×56.5,
=100×56.5,
=5650;

(1.25-0.125)×8
=1.25×8-0.125×8,
=10-1,
=9;

45÷0.09÷0.5
=45÷(0.09×0.5),
=1000;

17.8÷(1.78×4)
=17.8÷1.78÷4,
=2.5.
點(diǎn)評(píng):

        • <legend id="mmicz"><b id="mmicz"></b></legend>

              在簡(jiǎn)算過(guò)程中,增添括號(hào)或去掉括號(hào)時(shí)要注意運(yùn)算符號(hào)的改變.
              練習(xí)冊(cè)系列答案
              相關(guān)習(xí)題

              科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

              0.36÷9= 3.97-2.45= 16×25= 5.2+3.8=
              8.282÷8.2= 10-0.87= 4.3+1.8= 18.9-9.8=
              0.8÷0.1= 0.3+0.36= 1.14×0.2= 7.8÷3=
              0.8×15= 0.125×8= 4-1.08= 9×1.8=
              1.2×8= 7.82+1.18= 30.5÷2= 1.8×0.2=
              0.75÷30= 0.25×3= 4.8+1.2= 0.5×48=
              0.7×7= 1.1×9= 25×0.8= 3.2×5=
              3×1.2= 2.04×4= 0.72+2.8= 0×3.97=
              0.13×80= 18×30= 50×4.1= 0.125×2=
              6×0.75= 1.01-0.89= 9.767×0= 0.02×0.3=
              3.9÷5= 1÷0.125= 70÷5= 0÷9.126=
              0.72= 16.5÷0.15= 7÷1.4= 1.21÷11=
              0.84÷0.42= 0.7×0.9= 0.3×400= 5.1÷0.3=
              8.3+1.7= 4.9÷0.7= 0.3+0.3+0.3= 0.81÷0.9×5=
              (0.9+8.1)×5= 0.32= 9.3÷(4.2-1.1)= 1.7×0.6÷1.7=

              查看答案和解析>>

              科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

              口算
              (1)70×80=
              5600
              5600
                      3.7×0.5=
              1.85
              1.85
                   3.2×100=
              320
              320
                    8.9-3.8=
              5.1
              5.1

              (2)3.8+2.5+6.2=
              12.5
              12.5
                  12-6.2-3.8=
              2
              2
                 1.7+0.43+3.3=
              5.43
              5.43
                  3.4-1.5-0.5=
              1.4
              1.4

              (3)
              8
              9
              +
              1
              9
              --
              2
              7
              =
              5
              7
              5
              7
                   1.4×5=
              7
              7
                  650-470=
              180
              180
                  79+2.1=
              81.1
              81.1
                  
              (4)3.14×3=
              9.42
              9.42
                    6.7+3.4=
              10.1
              10.1
                 2.01×0.4=
              0.804
              0.804
                 
              6
              13
              +
              7
              13
              =
              1
              1

              (5)3.99+5.2=
              9.19
              9.19
                 23+6.68=
              29.68
              29.68
                 7×0.08=
              0.56
              0.56
                  0.25×0.4=
              0.1
              0.1

              (6)22×0.2=
              4.4
              4.4
                 99.9+1=
              100.9
              100.9
                 0.72÷6=
              0.12
              0.12
                 3.9÷1.3=
              3
              3

              (7)0.8×0.8=
              0.64
              0.64
                 5.88+3.12=
              9
              9
                 1.9+2.1=
              4
              4
                 26÷2.6=
              10
              10
                
              (8)340÷17=
              20
              20
                 9.3÷0.3=
              31
              31
                13×4=
              52
              52
                 3.6×5=
              18
              18

              (9)1.5×4=
              6
              6
                 20×16=
              320
              320
                 28×3=
              84
              84
                 3.2÷4=
              0.8
              0.8
               
              (10)0.28×100=
              28
              28
                 3200÷1000=
              3.2
              3.2
                 0.5×100=
              50
              50
                 4×0.125=
              0.5
              0.5

              (11)340+120=
              460
              460
                  
              1
              4
              +
              1
              2
              =
              3
              4
              3
              4
                 2.5÷5=
              0.5
              0.5
                 4.95×10=
              49.5
              49.5
                 
              (12)12-
              1
              2
              -
              1
              2
              =
              11
              11
                 1÷0.25=
              4
              4
                5×0.13=
              0.65
              0.65
                 12×0.05=
              0.6
              0.6

              (13)3.08÷0.1=
              30.8
              30.8
                 0.35×6=
              2.1
              2.1
                 25÷0.5=
              50
              50
                 1.5×3=
              4.5
              4.5

              (14)4.3-2.7=
              1.6
              1.6
                 8.1÷0.9=
              9
              9
                 12÷1.2=
              10
              10
                 0.48÷6=
              0.08
              0.08

              (15)2.6÷26=
              0.1
              0.1
                0.72×5=
              3.6
              3.6
                   4.8+3.2=
              8
              8
                 5.7÷0.3=
              19
              19

              查看答案和解析>>

              科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

              3.5×0.4= 2.5×0.4= 2.3×0.2= 2.1÷0.3=
              7.1×0.4= 4.5÷0.15= 1-0.07= 0.42÷0.7=
              12.4÷4= 2.5+1.5=  5.9×0.2= 0.48÷0.8=
              0.25×1.3×4= 20÷0.01= 9÷0.01= 5.5÷1.1=
              4.79+15.81= 0.3÷0.03= 0.2×0.1= 3.6+6.4=
              0.56÷0.28= 1.2×0.3= 6.7-5.6= 7.25÷0.5=
              4.2÷0.21= 4.3×0= 0.15÷0.5= 3.5×4=
              5.32-5.3= 1.25×3.4×8= 9.6÷3.2= 3.6+2.4=
              4.3-2.7+5.7= 7.2-5.6= 1.8÷0.9= 8.2×0.5=
              5.6÷0.4= 8.5÷5= 5.6×0.5= 9.8÷0.2=
              3.56×0.2= 3.4+1.5+4.6= 3.4×0.04= 6.12+3.48=
              6÷0.12= 7.6÷4= 3.4×0.5= 5.2-3.2-1.8=
              6-3.8= 7.5÷3= 3.5+5.4= 3×2.5=
              3.5+6.5= 7-6.23= 8÷0.4= 0.25×2.5=
              7.5÷0.5= 0.89-0.48= 3.5×0.8= 5.9-(3.2+0.9)=

              查看答案和解析>>

              科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:解答題

              0.89×0.48+0.89×0.520.25×13.7×0.44.2×101
              3.6×99 2.5×32×1.25 0.125×88
              56.5×99+56.5 (1.25-0.125)×845÷0.09÷0.5
              17.8÷(1.78×4)

              查看答案和解析>>

              同步練習(xí)冊(cè)答案
            • <table id="mmicz"><tbody id="mmicz"></tbody></table>