15.6-3.8-1.2= 能简算吗
15.6-3.8-1.2= 能简算吗
15.6-3.8-1.2
=15.6-(3.8+1.2)
=15.6-5
=10.6
1.2加3.24加0.76加3.8能简算吗?
1.2+3.24+0.76+3.8
=(1.2+3.8)+(3.24+0.76)
=5+4
=9
3.8*8.4 17.9能简算吗?
3.8×8.4+17.9
=4×8.4-0.2×8.4+18-0.1
=33.6-1.68+18-0.1
=49.82
25.6-3.8-6.21能简算吗?
25.6-3.8-6.21能简算
=25.6-(3.8+6.21)
=25.6-10.01
=25.6-10-0.01
=15.6-0.01
=15.59
15.6一7.28+80.1能简算吗?
15.6一7.28+80.1能简算
=(15+0.6)-(7+0.28)+(80+0.1)
=(15-7+80)+(0.6-0.28+0.1)
=88+0.42
=88.42
5.5 0.18除(5.2 3.8)能简算吗?
① 4 9 ÷( 5 6 - 1 2 )= 4 9 ÷ 1 3 ,= 4 9 ×3,= 4 3 ;②10.5×(3.8-0.8)÷6.3=10.5×3÷6.3,=31.5÷6.3,=5;③ 11 8 ×17-17× 3 8 =( 11 8 - 3 8 )×17,=1×17,=17;④1- 11 8 × 4 33 ÷ 7 2 =1- 1 6 × 2 7 ,=1- 1 21 ,= 20 21 .
不能简算
5.5 +0.18÷(5.2 +3.8)
=5.5+0.18÷9
=5.5+0.02
=5.52
3.8×4-10.5简算
3.8×4-10.5
=15.2-10.5
=4.7
确实无法简算
(2.4一0.6)*3.8简算
(2.4一0.6)*3.8简算
=1.8×3.8
=6.84
没有合适的简便方法
(15.6 9.4)x0.9简算
(15.6+9.4)x0.9
=25×0.9
=25×(1-0.1)
=25×1-25×0.1
=25-2.5
=22.5
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