遞等式計算(能簡算的要簡算,並寫出必要的計算過程)3 26 1 4 6 34

2021-04-30 04:27:47 字數 3331 閱讀 1573

1樓:幻彩

(1)3.26+1.4+6.34+9.6

=(3.26+6.34)+(1.4+9.6)=9.6+11

=20.6;

(2)19600-600÷5×25

=19600-120×25

=19600-3000

=16600;

(3)300-3.25+6.75

=296.75+6.75

=303.5;

(4)(36×19-19)÷35

=(684-19)÷35

=665÷35

=19;

(5)9600÷25

=9600÷25÷4×4

=9600÷(25×4)×4

=9600÷100×4

=96×4

=384;

(6)(67×76+76×58)×8

=76×(67+58)×8

=76×125×8

=76×(125×8)

=76×1000

=76000.

遞等式計算(能巧算的要巧算,並寫出必要的計算過程) 988÷4+1222167-67×5 648+375+25+152195×2÷3 89

2樓:小人保佑

(1)988÷4+122

=247+122

=369;

du(zhi2)2167-67×dao5

=2167-335

=1832;

(3)648+375+25+152

=(648+152)+(375+25)

=800+400

=1200;

(4)195×2÷3

=390÷3

=130;

(5)892-(158-192)

=892-158+192

=734+192

=926;

(6)96×6-6×46

=6×(96-46)

=6×50

=300.

遞等式計算,寫出必要的計算過程,能簡便計算的用簡便方法計算:(1)7.06×2.4-5.7 (2)5.4×99+5.4

3樓:百度使用者

(1)7.06×

2.4-5.7,

=16.944-5.7,

=11.244;

(2)5.4×99+5.4,

=5.4×(99+1),

=5.4×100,

=540;

(3)9.6×72+9.6×28,

=9.6×(72+28),

=9.6×100,

=960;

(4)(1.25×2.5)×4,

=1.25×(2.5×4),

=1.25×10,

=12.5;

(5)10.4+72×0.81,

=10.4+58.32,

=68.72;

(6)11×0.6×0.4,

=6.6×0.4,

=2.64;

(7)(12.8+4.99)÷0.2,

=17.79÷0.2,

=88.95;

(8)1.25×8+2.5×4.4,

=10+2.5×0.4×11,

=10+11,

=21.

用遞等式計算:(能簡便的就用簡便方法計算,並寫出主要計算過程)(1)38.78-19.59+41.22-30.41(2)2.7

4樓:娃娃

(zhi1)38.78-19.59+41.

22-30.41,=38.78+41.

22-19.59-30.41,=(38.

78+41.22)-(19.59+30.

41),dao=80-50,

=30;

(2)2.74×

回4.86+4.86×6.26+4.86,=(2.74+6.26+1)×

答4.86,

=10×4.86,

=48.6;

(3)0.08×(12.5+2.5)×0.1,=(0.08×12.5+0.08×2.5)×0.1,=(1+0.2)×0.1,

=1.2×0.1,

=0.12;

(4)25.92+(10.1-14.5×0.2),=25.92+(10.1-2.9),

=25.92+7.2,

=33.12;

(5)0.487×12.5÷48.7,

=0.487÷48.7×12.5,

=0.01×12.5,

=0.125;

(6)(8.16+2.09)÷[(10.3-9.3)÷0.4],=10.25÷[1÷0.4],

=10.25÷2.5,

=4.1.

用遞等式計算,能簡算的要寫出簡算過程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2×12.

5樓:最強黑客

(1)(2.5×6+2.5×4)÷5,

=2.5×(6+4)÷5,

=2.5×10÷5,

=25÷5,

=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,

=30;

(3)0.25×3.2×12.5,

=0.25×4×0.8×12.5,

=(0.25×4)×(0.8×12.5),=1×10,

=10;

(4)7.5÷(1.5+2.5),

=7.5÷4,

=1.875;

(5)0.6×(5+0.6)-1,

=0.6×5+0.6×0.6-1,

=3+0.36-1,

=3.36-1,

=2.36;

(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),

=3.7×1,

=3.7.

遞等式計算(能簡便算的要簡便算) 1311-7625÷25,3又5/9+1又11/18-2又5/6

6樓:雲山霧海

遞等式計算(能簡便算的要簡便算)

1311-7625÷25

=1311-305

=1006

3又5/9+1又11/18-2又5/6

=(3+1-2)+(5/9+11/18-5/6)=2+1/3

=2又1/3

2又5/7+5.9+7又2/7+4又1/10=2又5/7+7又2/7+(5.9+4又1/10)=10+10=20

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