Question

2．用自己喜歡的方法計(jì)算．
8.53+6.7=驗(yàn)算：
21.35-5.09=驗(yàn)算：
32×4×8
7.83-2.54+5.65
7.53-4.57-0.43
6.326+3.07-5.326+0.93．

Answer 1

分析 根據(jù)整數(shù)和小數(shù)加減乘除法運(yùn)算的計(jì)算法則進(jìn)行計(jì)算即可求解．注意7.53-4.57-0.43根據(jù)減法的性質(zhì)計(jì)算，6.326+3.07-5.326+0.93變形為（6.326-5.326）+（0.93+3.07）計(jì)算．

解答 解：8.53+6.7=15.23


21.35-5.09=16.26


32×4×8
=128×8
=1024

7.83-2.54+5.65
=5.29+5.65
=10.94

7.53-4.57-0.43
=7.53-（4.57+0.43）
=7.53-5
=2.53

6.326+3.07-5.326+0.93
=（6.326-5.326）+（0.93+3.07）
=1+4
=5

點(diǎn)評(píng) 考查了整數(shù)和小數(shù)加減乘除法運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．