1楼:手机用户
(1)11
18×9
10+11
18÷10
=1118
×(910
+110
)=11
18×1
=1118
(2)3-59×7
20-11
36=3-7
36-11
36=3-(7
36+1136)
=3?1
2=21
2(3)9.9×17.6
=(10-0.1)×17.6
=10×17.6-1.76
=174.24
(4)8.6-(5.6+4.8)÷1.3
=8.6-10.4÷1.3
=8.6-8
=0.6
(5)4
9÷[1?(25+1
10)×43]
=49÷[1-12×4
3]=49
÷13=43
脱式计算,能简算的要简算 240÷15÷4 129+318+71 304+278 25×(17×8) 700-300÷25
2楼: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.
脱式计算,能简算的要简算 22.3-2.45-5.3-4.55 920÷[12×(25+13)] [43.3×(2-75%)+7]×12
3楼:手机用户
(1)22.3-2.45-5.3-4.55,=(22.3-5.3)-(2.45+4.55),=17-7,
=10;
(2)9
20÷[1
2×(25+1
3)],
=920
÷[12
×1115
],=9
20÷1130,
=2722
;(3)[43.3×(2-75%)+7]×12,=[43.3×1.25+7]×12,
=[54.125+7]×12,
=61.125×12,
=30.5625;
(4)9
20×103?9
20×3,
=920
×(103?3),
=920
×100,
=45;
(5)5
9÷5+4
9÷4,=19
+19,=2
9;(6)12?6
13÷9
26?23,
=12-43-2
3,=12-(43+2
3),=12-2,
=10.
脱式计算:能简算的要简算。,脱式计算:一、能简算的要简算。③4/7×5/9+3/7×5/9 = = = =
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