70.08-1.25-1.75         4.6+2.89+5.4+3.11
22×10145×36+54×36+36           
25×(4×27)85×99+85.

解:(1)70.08-1.25-1.75,
=70.08-(1.25+1.75),
=70.08-3,
=67.08;

(2)4.6+2.89+5.4+3.11,
=(4.6+5.4)+(2.89+3.11),
=10+6,
=16;

(3)22×101,
=22×100+22×1,
=2200+22,
=2222;

(4)45×36+54×36+36,
=(45+54+1)×36,
=100×36,
=3600;

(5)25×(4×27),
=(25×4)×27,
=100×27,
=2700;

(6)85×99+85,
=85×(99+1),
=85×100,
=8500.
分析:(1)依據(jù)減法性質(zhì)解答;
(2)運(yùn)用加法交換律和結(jié)合律解答;
(3)(4)(6)運(yùn)用乘法分配律解答;
(5)運(yùn)用乘法結(jié)合律解答.
點(diǎn)評(píng):完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡(jiǎn)便方法計(jì)算.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

脫式計(jì)算.(能用簡(jiǎn)便方法計(jì)算用簡(jiǎn)便方法計(jì)算)
70.08-1.25-1.75         
4.6+2.89+5.4+3.11
22×101 45×36+54×36+36           
25×(4×27) 85×99+85.

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

口算
9.5×100=
1.25×8 0.25×0.9×4= 1.87×0=
3.5-1.5= 1.2×0.4= 3.6×0.5= 0.6×5=
0.24+0.6= 0.64×0.03= 7.8+2.2-1.5= 8×0.05=
0.125×8= 1.3×4= 0.4×0.6= 3×0.08=
0.35×2= 2.9×0.3= 10-0.9= 5.67×0=
0.8×0.01= 2.5×0.2= 2.4×0.3= 1.6×0.25=
0.17×0.3= 15×0.01= 10×0.07= 0.7×0.05=
0.2×0.05= 7.8×0.01= 0.2×0.26= 0.04×4=
12.4+2.1= 0.08×0.5= 0.14×4= 9×2.5+9×1.5=
1.8×0.5= 2.3×5= 0.3×3.6= 8×0.9+8×2.1=
2.5×4= 0.8+2.7×2= 0.05×7= 4.8+2.1+7.9=
3.4-1.8= 2.5+0.2×2= 0.02×0.1= 5.4-2.8=
0.3×0.2= 3.5×2×0.1= 0.3×0.3= 0×10.3×2.2=
0.12×0.7= 0.2×0.5= 0.92×0.4= 6.7-1.43=
1.2×4= 1.3×2= 1.2×0.3= 4.6+5.08=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

直接寫(xiě)出得數(shù).
(1)0.8-0.75=
(2)2.08﹢1.2= (3)7x-4.3x= (4)4a﹢6a=
(5)7.2÷0.3= (6)5.1÷0.17= (7)1.6×1.25= (8)24.8×0.01=
(9)11-0.13= (10)7÷0.35= (11)0.98-0.8= (12)8.37﹢0.63=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:解答題

直接寫(xiě)出得數(shù).
(1)0.8-0.75=
(2)2.08﹢1.2=(3)7x-4.3x=(4)4a﹢6a=
(5)7.2÷0.3=(6)5.1÷0.17=(7)1.6×1.25=(8)24.8×0.01=
(9)11-0.13=(10)7÷0.35=(11)0.98-0.8=(12)8.37﹢0.63=

查看答案和解析>>

同步練習(xí)冊(cè)答案