1樓:手機使用者
(1)9.2÷25%+0.4×
8=36.8+3.2
=40;
(2)17
8÷(178-3
4)=158×89
=53;(3)1-12-1
6-112-1
20-1
30=1-1
2-(12-1
3)-(13-1
4)-(14-1
5)-(15-1
6)=1-12-1
2+13-1
3+14-1
4+15-1
5+16=1
6;(4)(3.47+3.47÷1
3)×內2.5
=(3.47+3.47×3)×2.5
=3.47×4×2.5
=3.47×(容4×2.5)
=3.47×10
=34.7.
計算下面各題(能簡算的要簡算)48-2.3×1250×(0.8+0.4)7.34×2.1+7.34×7.8+7.34×1.120.5÷1.25÷0.
2樓:淹了學校
148-2.3×12,
=48-27.6,
=20.4;
250×(0.8+0.4),
=50×0.8+50×0.4,
=40+20,
=60;
37.34×2.1+7.34×7.8+7.34×1.1,=7.34×(2.1+7.8+1.1),
=7.34×10,
=73.4;
420.5÷1.25÷0.8,
=20.5÷(1.25×0.8),
=20.5÷1,
=20.5;
5(8.1-5.4)÷3.6+85.7,
=2.7÷3.6+85.7,
=0.75+85.7,
=86.45;
69.88×9+9.88,
=9.88×(9+1),
=9.88×10,
=98.8.
計算下面各題,能簡算的要簡算.9.5×1.06-2.52÷2.43.4×0.26+0.74×3.4 1.25×32×0.87.09×99+7.0968.
3樓:手機使用者
(1)9.5×1.06-2.52÷2.4
=10.07-1.05
=9.02;
(2)3.4×0.26+0.74×3.4
=3.4×(0.26+0.74)
=3.4×1
=3.4;
(3)1.25×32×0.8
=(1.25×0.8)×32
=1×32
=32;
(4)7.09×99+7.09
=7.09×(99+1)
=7.09×100
=709;
(5)68.5+31.5÷(0.29+0.41)=68.5+31.5÷0.7
=68.5+45
=113.5;
(6)0.4×5÷0.4×5
=2÷0.4×5
=5×5
=25.
計算下面各題,能簡算的要簡算
4樓:du知道君
2.5×
32×12.5 =(2.5×4)×(8×12.
5) =10×100 =1000 7/9÷11/5+2/9×5/11 =7/9×5/11+2/9×5/11 =(7/9+2/9)×5/11 =1×5/11 =5/11 3/5÷【(1/5+1/3)÷2/9】專 =3/5÷【8/15÷2/9】 =3/5÷12/5 =1/4 678-192÷8×12 =678-24×12 =678-288 =390 8×(7/8-5/9)×9 =8×7/8×9-8×5/9×9 =63-40 =23 2.解方屬程或解比例。 3/4x+x=1.
4 解:1.75x=1.
4 x=1.4÷1.75 x=0.8
脫式計算(能簡算的要簡算)4.36×12.5×8;15.2÷0.25÷4;0.
5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
6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
計算下面各題,能簡算的要簡算。
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