1樓:妖月
(du1)240÷15÷4,
zhi=240÷(15×dao4),
回=240÷60,
=4;(2)129+318+71,
=(129+71)+318,
=200+318,
=518;
(3)304+278,
=(300+4)+(300-22),
=300+300-(22-4),
=600-18,
=582;
(4)25×(17×8),
=25×8×17,
=(25×4)×(2×17),
=100×34,
=3400;
(5)(答614+346)÷48,
=960÷48,
=20;
(6)94×(205-188),
=94×17,
=1598;
(7)25×32×125,
=25×4×8×125,
=(25×4)×(8×125),
=100×1000,
=100000;
(8)420÷35,
=420÷(7×5),
=420÷7÷5,
=60÷5,
=12.
脫式計算(能簡算的要簡算):100+120÷15; 2.25×4.8+7.75×4.8; 316-58÷4; &...
2樓:邊緣
(1)100+120÷15,
=100+8,
=108;
(2)2.25×
4.8+7.75×4.8,
=4.8×(2.25+7.75),
=4.8×10,
=48;
(3)3
16-5
8÷4,
=316
-532,=6
32-532,
=132
;(4)16×2
5÷(56?3
4),=16
×25÷(10
12-9
12),
=115
÷112,=1
15×12,=45.
脫式計算(能簡算的要簡算)4.36×12.5×8;15.2÷0.25÷4;0.
3樓:胤胤胤
(bai1)4.36×du12.5×8
=4.36×(12.5×8)
=4.36×100
=436;
(zhi2)15.2÷dao0.25÷4
=15.2÷(
0.25×4)
=15.2÷1
=15.2;
(3)0.46×1.9+0.54×1.9
=(0.46+0.54)×
內1.9
=1×1.9
=1.9;
(4)3.6÷[(1.2-0.4)×0.5]=3.6÷[0.8×0.5]
=3.6÷0.4
=9.容
4樓:匿名使用者
先算12.5*8=100*4.36=436
15.2/0.25/4=15.2*(0.25*4)=12.5
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