(5)8.6×2.7+3.5×1.6 (6)(0.19×5.4+2.6×0.19)×12.5 (7)9.99×2.22+
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/02 22:24:55
(5)8.6×2.7+3.5×1.6 (6)(0.19×5.4+2.6×0.19)×12.5 (7)9.99×2.22+3.34×3.33
(8)1.2除4.2的商,再加5与6.02的积,和是多少?
多简便运算
(8)1.2除4.2的商,再加5与6.02的积,和是多少?
多简便运算
(5)8.6×2.7+3.5×1.6
=(10-1.4)×2.7+3.5×1.6
=10×2.7-1.4×2.7+7×0.8
=27-1.4×2.7+1.4×4
=27+1.4×(4-2.7)
=27+1.4×1.3
=27+1.82
=28.82
(6)(0.19×5.4+2.6×0.19)×12.5
=0.19×(5.4+2.6)×12.5
=0.19×(8×12.5)
=0.19×100
=19
(7)9.99×2.22+3.34×3.33
=3.33×6.66+3.34×3.33
=3.33×(6.66+3.34)
=3.33×10
=33.3
(8)1.2除4.2的商,再加5与6.02的积,和是多少?
4.2÷1.2+5×6.02
=4.2÷0.6÷2+5×6+5×0.02
=7÷2+30+0.1
=3.5+30.1
=33.6
=(10-1.4)×2.7+3.5×1.6
=10×2.7-1.4×2.7+7×0.8
=27-1.4×2.7+1.4×4
=27+1.4×(4-2.7)
=27+1.4×1.3
=27+1.82
=28.82
(6)(0.19×5.4+2.6×0.19)×12.5
=0.19×(5.4+2.6)×12.5
=0.19×(8×12.5)
=0.19×100
=19
(7)9.99×2.22+3.34×3.33
=3.33×6.66+3.34×3.33
=3.33×(6.66+3.34)
=3.33×10
=33.3
(8)1.2除4.2的商,再加5与6.02的积,和是多少?
4.2÷1.2+5×6.02
=4.2÷0.6÷2+5×6+5×0.02
=7÷2+30+0.1
=3.5+30.1
=33.6
(5)8.6×2.7+3.5×1.6 (6)(0.19×5.4+2.6×0.19)×12.5 (7)9.99×2.22+
(248/6)*(81/10)+21*9.25+537*0.19
-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)
-0.875-(-1又1\4)+3\4+1又7\8 [2.4-(-2.7+3.5)-2.2]-(-6.7+5.4)
()除以()等于0.19,9是循环结.
根号0.76/根号0.19=()=()
计算3.41×9.9×0.38÷(0.19×33/10×1.1)
简便运算:(6.5*0.68*2.28)/(1.3*1.7*0.19)=?
7.6×201.3+4.3×201.3-2013×0.19 (简便运算)
8.6立方分米=( )立方厘米 3.5立方米=( )立方分米 1.6升=( )毫升
2.5×(9.99×9.99×9.99×9.99)怎么简便计算?
3.5:0.4=x:8 x:3=2.8:4 42:x=3:6 5.4:2.7=0.4:x 0.4:x=(1+七分之一):