1樓:手機使用者
(1)150-100÷25
=150-4
=146;du
(2)22×
zhi(23+27)
=22×50
=1100;
(3)48÷12×2
=4×2
=8;(4)138+44+62
=138+62+44
=200+44
=244;
(5)37×5×2
=37×(5×2)
=37×10
=370;
(6)14×45
=(7×2)×dao45
=7×(2×45)
=7×90
=630.
計算下面各題,能簡便的要用簡便方法計算21÷(13+25)÷911920÷[12×(45+25)]5.65-6.29+5.35-2.713.7×99
2樓:桓廣英
(1)21÷(13+2
5)÷9
11=21÷11
15÷9
11=21÷(11
15×911)
=21÷3
5=35;
(2)9
20÷[1
2×(45+2
5)]=920
÷[12×65
]=920÷35=3
4;(3)5.65-6.29+5.35-2.71=(5.65+5.35)-(6.29+2.71)=11-9
=2;(4)3.7×99+3.7
=3.7×(99+1)
=3.7×100
=370.
計算下面各題.(能簡便的要用簡便方法計算)2.3+3.91÷(22-19.7)21.6÷[64.8-(48.6-2.7×2)]0.25×0
3樓:手機使用者
(1)2.3+3.91÷(22-19.7)=2.3+3.91÷2.3
=2.3+1.7
=4(2)21.6÷[64.8-(48.
6-2.7×2)]=21.6÷[64.
8-(48.6-5.4)]=21.
6÷[64.8-43.2]
=21.6÷21.6
=1(3)0.25×0.03×4
=(0.25×4)×0.03
=1×0.03
=0.03
0.13×3.89+0.13×5.11
=0.13×(3.89+5.11)
=0.13×9
=1.17
(5)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7
計算下面各題,能簡便的要用簡便方法計算.114×(14+112) 725×103-7...
4樓:尛辰丶
①114
×du(zhi14
+112
)dao
=114
×(312
+112)=1
14×13=1
42②7
25×103-7
25×2-7
25=7
25×(103-2-1)
=725
×100
=28③72
17+(5
18-217)
=7217
+518
-217
=(72
17-2
17)+5
18=7+5
18=7518
計算下面各題,能簡便的要用簡便方法計算. 1.3+0.94+0.06+7.7 6.27÷0.3+3 12.5×0.48
5樓:你大爺
(1)1.3+0.94+0.06+7.7,=(1.3+7.7)+(0.94+0.06),=9+1,
=10;
(2)6.27÷0.3+3,
=20.9+3,
=23.9;
(3)12.5×0.48×0.8,
=(12.5×0.8)×0.48,
=10×0.48,
=4.8;
(4)5.2×[(1.3+2.1)÷0.2],=5.2×[3.4÷0.2],
=5.2×17,
=88.4.
用簡便方法計算下列各題,用簡便方法計算下面各題 59 38 17
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