1樓:鵲橙尤
(1)45.07+(4.93+8.62),=45.07+13.55,
=58.62;
(2)12.5×(80+0.8),
=12.5×80+12.5×0.8,
=1000+10,
=1010;
(3)34.26+47.7-55.3+2.53,=34.26+(47.7+2.53)-55.3,=34.26+50.23-55.3,
=84.49-55.3,
=29.19;
(4)13.2-180÷45×2.6,
=13.2-4×2.6,
=13.2-10.4,
=2.8;
(5)4.7×2.4+0.
47×58+0.18×47,=4.7×2.
4+4.7×5.8+1.
8×4.7,=4.7×(2.
4+5.8+1.8),
=4.7×10,
=47;
(6)8.9+30.1÷[(5.04+3.56)×0.7],=8.9+30.1÷[8.6×0.7],
=8.9+30.1÷6.02,
=8.9+5,
=13.9.
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
2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.
用遞等式計算寫出必要的計算過程,能簡便計算的要簡便計算(1)28×105+7236÷18(2)4.5-3.15+0.5×8(3
3樓:匿名使用者
(1)28×105+7236÷18
=2940+402
=3342
(2)4.5-3.15+0.5×8
=4.5-3.15+4
=5.35
(3)8.5×5.3+3.7×8.5+8.5=8.5×(
5.3+3.7+1)
=8.5×10
=85(4)(0.7+1.7)×15-36=2.4×15-36
=36-36=0
用遞等式計算,寫出必要的計算過程,能簡便運算的要用簡便方法計
100 870 29 88 100 30 88 18 15 7.5 4.6 6.6 2 4.6 6.6 6.6 6.6 0 3.5 64 12.5 3.5 8 內 8 12.5 28 100 2800 容51 7.5 49 7.5 1 51 49 7.5 1 2 7.5 1 15 1 14 4 4....
計算要求寫出主要計算過程
1 2 5.4 31 4 14 3 38 9 2 27 5 13 4 7 3 935 2 108 20 65 20 7 3 935 2 43 20 7 3 935 2 20 43 7 3 935 2 20 43 7 3 9 35 40 43 3 5 24 43 2 10.75 411 12 27 1...
用遞等式計算能簡便計算的用簡便方法計算
1 53.2 6.3 6.3 0.7,53.2 6.3 9,50.5 2 2.5 0.25 0.025 4,2.5 4 0.25 4 0.025 4,10 1 0.1,8.9 3 50 16.9 13 0.6,50 1.3 0.6,48.7 0.6,29.22 4 1.25 0.8 4 25,1.2...