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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