1樓:手機使用者
①113+360÷24-18
=113+15-18
=128-18
=110;
②bai8.5×du2.8+2.8×1.5=(zhi8.5+1.5)×
dao2.8
=10×2.8
=28;
③(14+29
)×36=14
×36+2
9×36
=9+8
=17;④(回
13+12
)÷答(1-38)
=56÷58
=43.
計算下列各題,要寫出主要計算過程,能用簡便方法的要用簡便方法計算. ①16×18-120÷15 ②3.2×2.
2樓:手機使用者
①16×18-120÷15,
=288-8,
=280;
②3.2×2.77+0.23×3.2,
=3.2×(62616964757a686964616fe59b9ee7ad94313333353365362.77+0.23),
=3.2×3,
=9.6;
③7.6-2.05÷0.82,
=7.6-2.5,
=5.1;
④7 8
-517
+9 8
-1217
,=(7 8
+9 8
)-(5
17+12
17),
=2-1,
=1;⑤2 9
-716
×2 9
,=2 9
×(1-7
16),
=2 9
×916
,=1 8
;⑥13÷(1 4
+5 6
)×3 4
,=13÷13
12×3 4
,=12×3 4
,=9.
下面各題,能簡便計算的要用簡便方法計算.68×35-408÷24 57+98×79+18(0.63-0.63÷3)×0.53.
3樓:手機使用者
(制1)68×
35-408÷24
=2380-17
=2363;
(2)57+9
8×79+1
8=57+(78+1
8)=57
+1=157;
(3)(0.63-0.63÷3)×0.5
=(0.63-0.21)×0.5
=0.42×0.5
=0.21;
(4)3.64×0.25+4.36×0.25=(3.64+4.36)×0.25
=8×0.25
=2;(5)1.3-3.79+9.7-6.21=1.3+9.7-(3.79+6.21)
=11-10
=1;(6)3
22÷[5
4÷(143-1
2)]=322
÷[54
×625]=3
22×103=511.
計算下面各題,能簡便的最好用簡便方法計算.4.1÷0.41+22.5 &...
4樓:手機使用者
①bai4.1÷0.41+22.5
=10+22.5
=32.5
②2.01×
du99+2.01
=2.01×(
zhi99+1)
=2.01×100
=201
③5.6×3.9+3.9×4.4
=3.9×(5.6+4.4)
=3.9×10
=39④dao6.9×1.25×0.8
=6.9×(1.25×0.8)
=6.9×1
=6.9
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...
計算下列各題(脫式計算)簡便計算
98 265 202 273 73 27 98 202 265 273 73 27 300 265 273 100 565 173 250 13 4 3200 4 25 250 4 13 3200 4 25 1000 13 3200 100 13000 32 88 125 99 38 38 11 8...
用簡便方法計算下列各題要有過程,脫式計算
0.78 98 0.78 100 2 0.78 100 0.78 2 78 1.56 76.44 3.6 1.9 0.36 81 3.6 1.9 3.6 8.1 3.6 1.9 8.1 3.6 10 367.6 2.4 6.5 7.6 7.6 0.76 7.6 2.4 7.6 6.5 7.6 1 7...