1樓:萬受無疆
(1)7.9×12.5,
zhi=(8-0.1)dao×內12.5,=8×12.5-1×12.5,
=100-12.5,
=87.5;
(容2)25.38-1.43-4.
38-4.57,=25.38-4.
38-1.43-4.57,=(25.
38-4.38)-(1.43-4.
57),=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,=(0.8×1.25)×(0.4×2.5)×7.6,=1×1×7.6,
=7.6;
(5)2.3×0.48+0.
48×8.7-0.12×4,=2.
3×0.48+0.48×8.
7-0.48,=0.48×(2.
3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09.
用遞等式計算(寫出必要的計算過程,能簡便用簡便方法計算)(1)45.07+(4.93+8.62)(2)12.5×(80+0.
2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.
用遞等式計算.(寫出必要的計算過程,能簡便的用簡便方法計算) (9.4-5.8)×2.07 12.54-4.56
3樓:半邊枕
①(9.4-5.8)×2.07,
=3.6×2.07,
=7.452;
②12.54-4.56-3.44-1.54,=(版12.54-1.54)-(4.56+3.44),=11-8,
=3;③(9.36×權5+9.36+9.36×2)×1.25,=9.36×(5+2+1)×1.25,
=9.36×8×1.25,
=9.36×(8×1.25),
=93.6;
④7.236÷0.18-14.3×0.02,=40.2-0.286,
=39.914.
用遞等式計算.(寫出必要的計算過程,能簡便的用簡便方法計算) (9.4-5.8)×2.07 12.54-4.56-3.44-1.
4樓:奈落
①(bai9.4-5.8)×
duzhi2.07,
dao=3.6×2.07,
=7.452;
②12.54-4.56-3.44-1.54,=(12.54-1.54)-(4.56+3.44),內=11-8,
=3;③(9.36×5+9.36+9.36×2)×1.25,=9.36×(容5+2+1)×1.25,
=9.36×8×1.25,
=9.36×(8×1.25),
=93.6;
④7.236÷0.18-14.3×0.02,=40.2-0.286,
=39.914.
用遞等式計算,能簡便的要用簡便方法計算,寫出必要的計算過程 7280-280×12 1650-78-222+350 1230
5樓:手機使用者
(zhi1)dao7280-280×12,版=7280-3360,
=3920;
(2)1650-78-222+350,
=(1650+350)-(78+222),=2000-300,
=1700;
(3)1230÷6+15×13,
=205+195,
=400,;
(4)41×(權982+760÷38),
=41×(982+20),
=41×1002,
=41082;
(5)1472÷[﹙2100-1364﹚÷23],=1472÷[736÷23],
=1472÷32,
=46;
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
6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.
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)999+2+99+9+9 999+2(2)6.9×4+310
7樓:匿名使用者
1)999+2+99+9+9999+2,
抄=999+99+9+9999+(2+2),=(1000-1)+(100-1)+(10-1)+(10000-1)+4,
=11110-3+4,
=11109;
(2)6.9×4+310÷25,
=27.6+12.4,
=40;
(3)(3.5+6.5-6.5+3.5)÷4×2.5,=(10-6.5+3.5)÷4×2.5,
=7÷4×2.5,
=1.75×2.5,
=4.375;
(4)(8.6×3.4+3.4×3.4)×2.5,=(8.6+3.4)×3.4×2.5,
=12×3.4×2.5,
=4×3×3.4×2.5,
=(4×2.5)×(3×3.4),
=10×10.2,
=102;
(5)4.8+(1.6÷4+1.2)÷5,=4.8+(0.4+1.2)÷5,
=4.8+1.6÷5,
=4.8+0.32,
=5.12;
(6)6.25÷[(17.2-9×1.
8)÷0.016],=6.25÷[(17.
2-16.2)÷0.016],=6.
25÷[1÷0.016],
=6.25÷62.5,
=0.1.
用遞等式計算能簡算的要寫出簡算過程
du1 8.5 2.36 2.42 0.25 8.5 zhi 4.78 dao0.25 8.5 內19.12,162.52 容2 3.9 1.3 0.6 6 3.6 3.9 1.3 0.6 0.6 6 3.6 3.9 0.78 3.6 3.6 3.9 0.78,5 3 4.25 6.3 3.7 4....
用遞等式計算
1 26 37 50 63 50 13 2 2.5 1.4 8.5 5 3.5 1.7 1.8 3 版34 18 5 6 58 5 8 1 4 1 15 23 1 5 權126 115 13 15 126 115 130 2 解答du 解 1 26 37 50 63 50 13 2 2.5 zhi1...
計算題要求寫出計算過程54,計算題要求寫出計算過程
1原式抄 bai 20 6 14 du2原zhi式 16 7 14 dao 7 112 2 114 3原式 3 12 2 3 12 1 4 12 1 2 3 8 3 6 14 4原式 16 8 3 2 2 3 2 1 8 17 8 5原式 81 9 3 2 4 9 5 2 13 2 6原式 37 3...