人教版四年级数学下册运算定律练习题81文档格式.docx
《人教版四年级数学下册运算定律练习题81文档格式.docx》由会员分享,可在线阅读,更多相关《人教版四年级数学下册运算定律练习题81文档格式.docx(11页珍藏版)》请在冰豆网上搜索。
579×
5+579×
5=579×
(____+____)
(82+43)×
n=____×
____+____×
二、下面各题怎样简便怎样计算。
72+19+7138+85+12
63×
50×
220×
(5+10)
420-85-15817-79-217
93×
25+75×
933400÷
50÷
2
130+65+23557+618+13
2000÷
100÷
1025×
25×
40
79+71+21+29220+420+180+680
64×
125199×
31+31
772-27-26-47832-132-77-23
403×
1225×
2811×
501
5+6+7+…+22+23+24
1089×
74-89×
7479+999×
79
1+3+5+…+15+17+19
27-26+25-24+…+11-10+9-8
45+33-27+67+55
(30+19)+71=30+(____+____)
480+(320+44)=(480+____)+____
____+85=85+22
277-64-36=277〇(64+____)
98×
10=10×
60×
7×
6=60×
(7×
20×
(5×
25)=(____×
159×
3+159×
7=159×
(76+37)×
m=____×
78+21+6972+62+18
54×
420×
113-52-48576-69-176
53×
20+80×
537300÷
10÷
10
565+35+46572+934+28
9000÷
200÷
550×
12×
20
78+77+22+23130+400+200+270
40×
26+26
810-11-11-78974-374-43-57
406×
1125×
4413×
403
2+3+4+…+19+20+21
123×
89-23×
8959+99×
59
7+9+11+…+21+23+25
33-32+31-30+…+17-16+15-14
12+53-35+47+88
(88+12)+48=88+(____+____)
200+(800+50)=(200+____)+____
____+56=56+20
681-41-59=681〇(41+____)
39=39×
50×
6×
2=50×
(6×
4×
(25×
19)=(____×
981×
8+981×
2=981×
(93+86)×
48+39+3136+99+14
10×
1050×
(2+4)
323-74-26696+28-396
74+26×
547600÷
512+49+15166+784+14
6000÷
4÷
2505×
53×
200
49+58+51+42270+380+520+530
25999×
18+18
574-24-21-55592-192-59-41
405×
1325×
3616×
401
6+7+8+…+23+24+25
172×
54-72×
5487+9×
87
2+4+6+…+16+18+20
28-27+26-25+…+12-11+10-9
48+65-14+35+52
(32+27)+43=32+(____+____)
480+(520+37)=(480+____)+____
____+69=69+37
671-48-52=671〇(48+____)
59×
47=47×
90×
9×
8=90×
(9×
28)=(____×
928×
3+928×
7=928×
(80+13)×
a=____×
47+46+1473+59+17
18×
450×
926-60-40698-40-398
42×
30+70×
427200÷
20÷
5
705+87+91390+863+10
7000÷
10050×
44×
51+56+49+44180+150+750+820
72×
259×
73+73
927-11-11-78811-311-33-67
506×
1725×
5615×
102
3+4+5+…+20+21+22
129×
79-29×
7944+99×
44
21-20+19-18+…+5-4+3-2