2025年口算训练四年级数学上册人教版双色升级版第47页答案
$202×50= $
$7800+900= $
$910×2= $
$442×60= $
$305×60= $
$520×70= $
$80×602= $
$70×602= $
$60×602= $
$40×602= $
$90×602= $
$30×602= $
$50×602= $
$20×602= $
$100×602= $
$100×99+99= $
$99×602+602= $
$99×23= $
$99×23+23= $
$99×102= $
$9×102+102= $

答案

解析:这些题目主要考查了基础的数学运算能力,包括乘法、加法和乘法分配律的应用。对于乘法运算,需要注意数位对齐和进位。对于加法运算,特别是大数相加,要注意相同数位对齐。同时,还考查了如何运用乘法分配律进行简便计算。
答案:
$202 × 50 = 10100$
$7800 + 900 = 8700$
$910 × 2 = 1820$
$442 × 60 = 26520$
$305 × 60 = 18300$
$520 × 70 = 36400$
$80 × 602 = 48160$
$70 × 602 = 42140$
$60 × 602 = 36120$
$40 × 602 = 24080$
$90 × 602 = 54180$
$30 × 602 = 18060$
$50 × 602 = 30100$
$20 × 602 = 12040$
$100 × 602 = 60200$
$100 × 99 + 99 = 9900 + 99 = 9999$
$99 × 602 + 602 = 59598 + 602 = 60200$
$99 × 23 = 2277$
$99 × 23 + 23 = 2277 + 23 = 2300$
$99 × 102 = 10098$
$9 × 102 + 102 = 918 + 102 = 1020$
$101×62=$
6262

$99×602=$
59598

$100×99+100=$
10000

$80×125=$
10000

$88×125=$
11000

$80×40=$
3200

$250×40=$
10000

$11×80=$
880

$11×90=$
990

$101×80=$
8080

$101×90=$
9090

$11×11=$
121

$0×538=$
0

$175×20=$
3500

$380×40=$
15200

$394×60=$
23640

$125×80=$
10000

$150×30=$
4500

$360×20=$
7200

$360×40=$
14400

$380×50=$
19000

答案

解析:这些题目主要考查四则运算,特别是乘法运算,包括一些简便运算和基础的乘法计算。
答案:
$101×62 = 6262$
$99×602 = 59598$
$100×99 + 100 = 10000$
$80×125 = 10000$
$88×125 = 11000$
$80×40 = 3200$
$250×40 = 10000$
$11×80 = 880$
$11×90 = 990$
$101×80 = 8080$
$101×90 = 9090$
$11×11 = 121$
$0×538 = 0$
$175×20 = 3500$
$380×40 = 15200$
$394×60 = 23640$
$125×80 = 10000$
$150×30 = 4500$
$360×20 = 7200$
$360×40 = 14400$
$380×50 = 19000$
$120×60=$
7200

$109×50=$
5450

$48×50=$
2400

$35×300=$
10500

$305×30=$
9150

$850×40=$
34000

$402×50=$
20100

$15×800=$
12000

$24×500=$
12000

$70×90=$
6300

$140×50=$
7000

$80×100=$
8000

$968+132=$
1100

$160×30=$
4800

$30×50=$
1500

$15×40=$
600

$120×50=$
6000

$150×4=$
600

$150×40=$
6000

$340×20=$
6800

$20×340=$
6800

答案

解析:
这些题目都是基础的乘法和加法运算,主要考查学生的计算能力。
答案:
$120×60 = 7200$;
$109×50 = 5450$;
$48×50 = 2400$;
$35×300 = 10500$;
$305×30 = 9150$;
$850×40 = 34000$;
$402×50 = 20100$;
$15×800 = 12000$;
$24×500 = 12000$;
$70×90 = 6300$;
$140×50 = 7000$;
$80×100 = 8000$;
$968 + 132 = 1100$;
$160×30 = 4800$;
$30×50 = 1500$;
$15×40 = 600$;
$120×50 = 6000$;
$150×4 = 600$;
$150×40 = 6000$;
$340×20 = 6800$;
$20×340 = 6800$。