計算下面各題,能簡算的要簡算

2021-03-04 01:38:36 字數 1900 閱讀 6606

1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,並寫出主要的簡算過程.(1)9.06-2.68-0.32(2)(3.06÷0.25+2.76)×0

2樓:褲兜最棒

(1)9.06-2.68-0.32,

=9.06-(2.68+0.32),

=9.06-3,

=6.06;

(2)(3.06÷0.25+2.76)×

0.2,

=(12.24+2.76)×0.2,

=15×0.2,

=3;(3)18-(3

5+4÷25),

=18-(0.6+4×52),

=18-(0.6+10),

=18-10.6,

=7.4;

(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,

=(2.7+5.3)×1.25,

=8×1.25,

=10.

計算下面各題,能簡算的要簡算。(脫式計算) (6/35+4/21)÷4/7 2/ 50

3樓:匿名使用者

(6/35+4/21)÷4/7

=6/35×7/4+4/21×7/4

=3/10+1/3

=9/30+10/30

=19/30

2/9÷2/7÷14/15

=2/9×7/2×15/14

=14/18×15/14

=5/6

(5/6-3/4)÷5/12+4/5

=5/6×12/5-3/4×12/5+4/5=2-9/5+4/5

=2-13/5

=-3/5

3/10÷(4/5-1/2)

=3/10×5/4-3/10×2

=3/8-3/5

=15/40-24/40

=-9/40

2/25÷3/7+23/25÷3/7

=(2/25+23/25)÷3/7

=1×7/3

=2又1/3

8/9÷5/6+1/6

=8/9×6/5+1/6

=16/15+1/6

=32/30+5/30

=37/30

=1又7/30

2/3x=16

x=16×3/2

x=24

3/4x+1/4=3/8

3/4x=3/8-1/4

3/4x=1/8

x=1/8×4/3

x=1/6

1/5x-1/2=3/10

1/5x=1/2+3/10

1/5x=8/10

x=8/10×5x=4

4樓:**防騙

6/35x7/4十4/2lx7/4=3/10十1/3=9/30十10/30=19/30

2/9x7/2x1/14=1/185/6

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