1樓:翰林書院
4.32-(1.26+2.34)
=權4.32-3.6
=0.72
4.58-(1.42+2.58)
=4.58-1.42-2.58
=4.58-2.58-1.42
=2-1.42
=0.58
3.6-1.28+3
=2.32+3
=5.32
脫式計算能簡算的要用簡便方法計算。1+2+4+8+16+32+64+128+256+512+102
2樓:匿名使用者
2.5×
0.32×125
=(2.5×0.4)×(0.8×回125)=1×100
=100
907×99+907
=907×(99+1)
=907×100
=90700
(1/3+1/4+1/5)×60
=(1/3)×60+(1/4)×60+(1/5)×60=20+15+12
=47[(1/7)-(1/9)]×63-(2/3)=(1/7)×63-(1/9)×63-(2/3)=9-7-(2/3)
=1又1/3
(3/5)×[(2/8)×2-(1/3)]=(3/5)×[(1/2)-(1/3)]
=(3/5)×(1/6)
=1/10
÷(4/5)
=×(5/4)
=(4/15)×(5/4)
=1/3
12.5×4×0.25×8
=(12.5×8)×(4×0.25)
=100×1
=100
(6/7)×125×7×8
=[(6/7)×7]×(125×8)
=6×1000
=6000
24×[(5/8)+(5/6)]-35
= 24×(5/8)+24×(5/6)-35=15+20-35
=35-35
=0(分答數我用括號括起來了,寫的時候記得去掉,5/8讀作八分之五,應該看得懂吧!)
有疑問,請追問
3樓:宇文昌
。。。你 他 媽 在玩兒我吧!
脫式計算能用簡便計算的要簡算.(1)310+4.25+3.7+134(2)0.125×3.2×25(3)17×44+54×17(4)7.8÷
4樓:手機使用者
(1)3
10+4.25+3.7+134=3
10+3.7+4.25+13
4=(3
10+3.7)+(4.25+134)
=4+6
=10;
(2)0.125×3.2×25
=0.125×8×0.4×25
=(0.125×8)×版(權0.4×25)=1×10
=10;
(3)1
7×44+54×17=1
7×(44+54)=17
×98=14;
(4)7.8÷〔32×(1-5
8)+3.6〕
=7.8÷〔32×3
8+3.6〕
=7.8÷〔12+3.6〕
=7.8÷15.6
=0.5;
(5)5
6÷〔3
4×(79-1
3)〕=56
÷〔34×49
〕=56÷1
3=2.5.
9.58-(4.58+2.3)簡便方法?
5樓:匿名使用者
9.58-(4.58+2.3)
=9.58-4.58-2.3
=5-2.3
=2.7
6樓:
原式=9.58-4.58-2.3
=5-2.3
=2.7
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