1樓:匿名使用者
2÷du0.25-0.25÷2
=8—0.125
=7.875
2.5×
zhi(dao4-0.8)×
專1.25
=(2.5×0.4)×(1.25×8)
=10。
(3.2×0.6÷屬3.2×0.6)÷1.2=(3.2÷3.2)×(0.6×0.6÷1.2)=0.3
用遞等式計算(能簡算的要簡便計算) 0.175÷0.25×4.27.52-(7.7-2.48)+32.7.3.2×(2.5+12.5)6.8×
2樓:摯愛慧瑩uj卑
(1)0.175÷0.25×4
=0.7×4
=2.8
(2)27.52-(7.7-2.48)+32.7=27.52-7.7+2.48+32.7
=(27.52+2.48)+(32.7-7.7)=30+25
=55(3)3.2×(2.5+12.5)
=3.2×2.5+3.2×12.5
=0.8×(4×2.5)+0.4×(8×12.5)=0.8×10+0.4×100
=8+40
=48(4)6.8×3.7-3.7+37×0.42=6.8×3.7-3.7+3.7×4.2
=(6.8-1+4.2)×3.7
=10×3.7
=37(5)[(7.6-5.8)×0.8-1]×5.5=[1.8×0.8-1]×5.5
=[1.44-1]×5.5
=0.44×5.5
=2.42
(6)(7.8+2.2×5)÷(4-3.06)=(7.8+11)÷0.94
=18.8÷0.94=20
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
1.25x(0.8+0.4)x2.5能用簡便麼?能的話怎麼做?
5樓:用智慧型為你解答
1.25x(0.8+0.4)x2.5
=1.25x2.5x0.8+1.25x2.5x0.4=1x2.5+1.25x1
=2.5+1.25
=3.75
有不明白的可以追問!謝謝!!
祝學習進步!
6樓:睡神臭臭
可以簡便計算:
1.25x(0.8+0.4)x2.5
=(1.25x0.8+1.25x0.4)x2.5=(1+1.25x0.4)x2.5
=1x2.5+1.25x0.4x2.5
=2.5+1.25x1
=2.5+1.25
=3.75
【不懂歡迎追問,有幫助請採納】
7樓:帷幄致樽
1.25x(0.8+0.4)x2.5
=1.25*0.8*2.5+1.25*0.4*2.5=1*2.5+1*1.25
=3.75
是這樣嗎
8樓:匿名使用者
先算後式再算前式
(0.8*2.5+0.4*2.5)=3
3*1.25=3.75
答案是3.75
脫式計算.(能簡算的要簡算) 0.125×0.25×8×4 [5-1.7÷(2-1)]×1 87×386 49÷(79+49)×114
9樓:手機使用者
(1)0.125×
源0.25×8×4,
=(0.125×8)×(0.25×4),
=1×1,
=1;(2)[5-1.7÷(2-1)]×1,=[5-1.7÷1]×1,
=[5-1.7]×1,
=3.3×1,
=3.3;
(3)87×386,
=(86+1)×386,
=86×3
86+1×386,
=3+386,
=3386
;(4)4
9÷(79+4
9)×114,
=49÷119
×114,=4
11×114,
=1;(5)3.9÷1.5-2.3×0.5,=2.6-1.15,
=1.45;
(6)112÷3
4-58×1635,
=2-27,
=157.
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