作业帮求0.9乘8.4加1乘0.84 72乘1.25 0.36乘2.4加76乘0.036 125.125乘8加24.75乘4 7.68减3.56加2.32减5.4478.4减31.94减18.06 2.61 乘39.5加0.318乘261加2.87乘26.1的简便运算
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 02:16:29
求0.9乘8.4加1乘0.84 72乘1.25 0.36乘2.4加76乘0.036 125.125乘8加24.75乘4 7.68减3.56加2.32减5.4478.4减31.94减18.06 2.61 乘39.5加0.318乘261加2.87乘26.1的简便运算
求0.9乘8.4加1乘0.84 72乘1.25 0.36乘2.4加76乘0.036 125.125乘8加24.75乘4 7.68减3.56加2.32减5.44
78.4减31.94减18.06 2.61 乘39.5加0.318乘261加2.87乘26.1的简便运算
求0.9乘8.4加1乘0.84 72乘1.25 0.36乘2.4加76乘0.036 125.125乘8加24.75乘4 7.68减3.56加2.32减5.4478.4减31.94减18.06 2.61 乘39.5加0.318乘261加2.87乘26.1的简便运算
0.9乘8.4加1乘0.84
=9×0.84+0.84
=（9+1）×0.84
=10×0.84
=8.4
72乘1.25
=9*（8*1.25）
=9*10
=90
0.36乘2.4加76乘0.036
=0.36×2.4+7.6×0.36
=0.36×（2.4+7.6）
=0.36×10
=3.6
125.125乘8加24.75乘4
=250.25×4+24.75×4
=（250.25+24.75）×4
=300×4
=1200
7.68减3.56加2.32减5.44
=（7.68+2.32）-（3.56+5.44）
=10-9
=1
=
78.4减31.94减18.06
=78.4-（31.94+18.06）
=78.4-50
=28.4
2.61 乘39.5加0.318乘261加2.87乘26.1
=2.61×39.5+31.8×2.61+28.7×2.61
=2.61×（39.5+31.8+28.7）
=2.61×100
=261