脱式计算. 8.82×15-100 15.8-718
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/09 17:54:49
脱式计算.
8.82×15-100 | 15.8-
(1)8.82×15-100
=132.3-100 =32.3; (2)15.8- 7 18+14.2- 11 18 =(15.8+14.2)-( 7 18+ 11 18) =30-1 =29; (3)21.6-0.8×4÷0.8×4 =21.6-3.2÷0.8×4 =21.6-4×4 =21.6-16 =5.6; (4)3 3 5×3.7+3.6+5.3×3 3 5 =3 3 5×3.7+3 3 5×1+5.3×3 3 5 =3 3 5×(3.7+1+5.3) =3 3 5×10 =36; (5)2.5×4.4 =2.5×(4+0.4) =2.5×4+2.5×0.4 =10+1 =11; (6)(1.5+2 2 3)÷3.75- 2 3 = 25 6÷3.75- 2 3 = 25 6× 4 15- 2 3 = 10 9- 2 3 = 4 9. |