初1数学（拖式，计算）

来源：百度知道 编辑：UC知道 时间：2024/06/09 05:27:42
10.15-10.75×0.4-5.7 3×（2/15＋1/12）-2/5

5×〈（3.2＋4.06）÷6.05〉 9.18÷1.7＋3.75÷1.5

9.4×〈1.28-（1.54-0.31）〉 〈（6.1-4.6）÷0.8-1〉×0.4

4.38÷(36.94＋34.2×0.2) 5/8÷5/4＋3/23÷9/11

9/7-(2/7-10-21) -2.5×(-4.8)×0.09÷(-0.27)
负数的可能难一点,今天8点前要.谢谢

10.15-10.75×0.4-5.7
=10.15-4.3-5.7
=0.15

3×（2/15＋1/12）-2/5
=3×2/15 +3×1/12 -2/5
=2/5+1/4-2/5
1/4

5×〈（3.2＋4.06）÷6.05〉
=5×7.26÷6.05
=7.26÷1.21
=6

9.18÷1.7＋3.75÷1.5
=5.4+2.5
=7.9

9.4×〈1.28-（1.54-0.31）〉
=9.4×〈1.28-1.23〉
=9.4×0.05
=0.47

〈（6.1-4.6）÷0.8-1〉×0.4
=(1.5÷0.8-1)×0.4
= 1.5÷0.8×0.4-0.4
=1.5÷2-0.4
=0.75-0.4
=0.35

4.38÷(36.94＋34.2×0.2)
=4.38÷(36.94+6.84)
=4.38÷43.78
约=0.1
题写错了吧，如是4.38÷(36.94＋34.3×0.2)
=4.38÷(36.94+6.86)=4.38÷43.8=0.1

5/8÷5/4＋3/23÷9/11
=1/2+11/69
=91/138
题写错了吧，如是5/8÷5/4＋3/22÷9/11=1/2+1/6=2/3

9/7-(2/7-10-21) -2.5×(-4.8)×0.09÷(-0.27)
=7/9-2/7+10+21-12÷3
=1+10+21-4
=28