题目内容
2.47×6.5+7.53×6.5 | 66.96÷72-0.87 | 76.1×17-76.1×7 |
65.7×0.35+0.15 | 29.6÷7.4×1.2 | 0.65×101. |
解:(1)2.47×6.5+7.53×6.5,
=(2.47+7.53)×6.5,
=10×6.5,
=65;
(2)66.96÷72-0.87,
=0.93-0.87,
=0.06;
(3)76.1×17-76.1×7
=76.1×(17-7),
=76.1×10,
=761;
(4)65.7×0.35+0.15,
=22.995+0.15,
=23.145;
(5)29.6÷7.4×1.2
=4×1.2,
=4.8;
(6)0.65×101
=0.65×100+0.65,
=65+0.65,
=65.65.
分析:算式一、三、六可据分配律进行简算,其它算式可据四则混合运算法则进行计算.
点评:完成本题要认真分析式中数据,能简算的要简算,有小数的算式中要注意小数点位置的变化.
=(2.47+7.53)×6.5,
=10×6.5,
=65;
(2)66.96÷72-0.87,
=0.93-0.87,
=0.06;
(3)76.1×17-76.1×7
=76.1×(17-7),
=76.1×10,
=761;
(4)65.7×0.35+0.15,
=22.995+0.15,
=23.145;
(5)29.6÷7.4×1.2
=4×1.2,
=4.8;
(6)0.65×101
=0.65×100+0.65,
=65+0.65,
=65.65.
分析:算式一、三、六可据分配律进行简算,其它算式可据四则混合运算法则进行计算.
点评:完成本题要认真分析式中数据,能简算的要简算,有小数的算式中要注意小数点位置的变化.
练习册系列答案
相关题目
10×2= | 72-47= | 20×5= | 27+15= | 20÷2= |
63÷3= | 27×5= | 510÷3= | 40×9= | 23×30= |
84÷4= | 15÷3= | 12×4= | 513×9= | 4×815= |
99÷9= | 75÷5= | 205÷5= | 46×10= | 24×20= |
872-124= | 27+127= | 700÷5= | 350+70= | 591÷3= |
8×122= | 178÷2= | 30×80= | 800÷8= | 265+85= |
110×35= | 901÷3= | 0÷245= | 0×245= | 0+245= |
245÷5= | 3000-300= | 605÷5= | 50×50= | 306÷3= |
702-199= | 480÷3= | 120×80= | 27×8= | 62×15= |
860÷4= | 19×5= | 40×20= | 520-430= | 51×17= |
15×61= | 87÷3= | 91×31= | 80÷10= | 465÷5= |
870÷8= | 400×20= | 210÷7= | 4500÷9= | 5×80= |
300×30= | 88+112= | 380÷7= | 36×8= | 86×7= |
27×90= | 33÷3= | 880÷8= | 480÷8= | 22×22= |
16×50= | 19×39= | 270÷30= | 92×7= | 38×60= |
14×4= | 130×4= | 810÷3= | 72-24= | 16×4= |
= | = | = | = | = |
= | = | = | 8×7+6= | 6×7+6= |
36÷3÷2= | 5×5+4= | 50-24÷4= | 9+9÷9= | 800-800÷4= |
8×9-7= | 72-72÷6= | 8+2×10= | 90-30÷3= | 6×80-20= |
12×3÷3= | 5×8-8= | 57×3×0= | 86-86÷2= | 8×2×7= |
24+15+6= | 18÷3-4= | 50×6+0= | 45+55÷5= | 70×(40-32)= |
300÷2÷5= | 960÷4÷2= | 51-4×6÷3= | 3000-6×408= | 500-412÷4= |
(400-394)×706= | 1+2+3+4+5+6+7+8+9+10= | 1+11+111+1111+1111= | 1+12+123+1234+12345= | 10000-1000-100-10-1= |