18·76×9·9＋18·76 0·25×16·2×0·4 4·8×9·9 7·09×10·8 －0.8×7.09 4.8×100.1 4.2 ÷3.5 32
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/15 11:07:14
18·76×9·9＋18·76 0·25×16·2×0·4 4·8×9·9 7·09×10·8 －0.8×7.09 4.8×100.1 4.2 ÷3.5 32
18·76×9·9＋18·76 0·25×16·2×0·4 4·8×9·9 7·09×10·8 －0.8×7.09 4.8×100.1 4.2 ÷3.5 32
18·76×9·9＋18·76 0·25×16·2×0·4 4·8×9·9 7·09×10·8 －0.8×7.09 4.8×100.1 4.2 ÷3.5 32
18.76*9.9+18.76
=18.76*10+18.76-1.876
=187.6+18.76-1.876
=204.484
0.25*16.2*0.4
=0.25*0.4*16.2
=0.01*16.2
=0.162
4.8*9.9
=4.8*10-0.48
=48-0.48
=47.52
7.09*10.8-0.8*7.09
=7.09*(10.8-0.8)
=7.09*10
=70.9
4.8*100.1
=4.8*100-4.8*0.1
=480-0.48
=479.52
4.2÷3.5
=4.2÷7÷0.5
=0.6÷0.5
=1.2
把题目表示清楚
18·76×9·9＋18·76
=18·76×（9·9＋1）
=18.76×10＋18.76-18.76×0.1
=204.484
0·25×16·2×0·4
=0·25×0·4 ×16·2
=0.1×16.2
=1.62
4·8×9·9
=4.8×(10-0.1)
=4.8×10-4.8×0.1
=48...
全部展开
18·76×9·9＋18·76
=18·76×（9·9＋1）
=18.76×10＋18.76-18.76×0.1
=204.484
0·25×16·2×0·4
=0·25×0·4 ×16·2
=0.1×16.2
=1.62
4·8×9·9
=4.8×(10-0.1)
=4.8×10-4.8×0.1
=48-0.48
=47.52
7·09×10·8 －0.8×7.09
=7·09×(10·8 －0.8)
=7·09×10
=70.9
4.8×100.1
=4.8×100＋4.8×0.1
=480＋0.48
=480.48
4.2 ÷3.5
=4.2÷(0.7×5)
=4.2÷0.7÷5
=6÷5
=1.2
收起