2026年口算基础训练四年级数学下册人教版第68页答案
计算
$63 + 37 =$
$44×25 =$
$530 + 480 =$
$24×30 =$
$56×50 =$
$0×500 =$
$910 - 190 =$
$738 + 185 =$
$40×15 =$
$720÷8 =$
$600÷25 =$
$270 + 390 =$
$85 - 29 + 29 =$
$56 - 37 + 13 =$
$120×50 =$
$700÷14 =$
$0.7 - 0.36 =$
$485 - 395 =$
$180×30 =$
$614 - 195 =$
$302 + 108 =$
$0.17 + 0.8 =$
$833 + 169 =$
$1000 - 285 =$
$120×7 =$
$75×50 =$
$25×48 =$
$580 - 121 =$
$580×20 =$
$70×78 =$
$330 + 180 =$
$3.71 + 0.29 =$
$250 + 150 =$
$50 - 8.3 =$
$140×9 =$
$660÷60 =$
$240÷48 =$
$584 - 125 =$
$0.36 - 0.19 =$
$90×35 =$
$312 + 108 =$
$50×170 =$
$48×50 =$
$500 - 189 =$
$625 - 285 =$
$718 + 182 =$
$960÷8 =$
$306÷6 =$
$60÷2÷5 =$
$530 - 350 =$
$841 - 148 =$
$56 - 37 - 13 =$
$640÷80 =$
$6400÷80 =$

答案

$100$;$1100$;$1010$;$720$;$2800$;$0$;$720$;$923$;$600$;$90$;$24$;$660$;$85$;$32$;$6000$;$50$;$0.34$;$90$;$5400$;$419$;$410$;$0.97$;$1002$;$715$;$840$;$3750$;$1200$;$459$;$11600$;$5460$;$510$;$4$;$400$;$41.7$;$1260$;$11$;$5$;$459$;$0.17$;$3150$;$420$;$8500$;$2400$;$311$;$340$;$900$;$120$;$51$;$6$;$180$;$693$;$6$;$8$;$80$。

解析

1.$63 + 37=100$;
2.$44×25 = 40×25+4×25=1000 + 100=1100$(将$44$拆分为$40 + 4$,然后利用乘法分配律计算);
3.$530+480 = 1010$;
4.$24×30 = 720$;
5.$56×50=2800$;
6.$0×500 = 0$;
7.$910 - 190=720$;
8.$738+185 = 923$;
9.$40×15 = 600$;
10.$720÷8 = 90$;
11.$600÷25=600÷(5×5)=120÷5 ÷5 = 24÷5=24×\frac{1}{5}((或2.4×5÷5))= 24$(将$25$拆分为$5×5$);
12.$270+390 = 660$;
13.$85 - 29+29=85-(29 - 29)=85$;
14.$56 - 37+13=19 + 13=32$;
15.$120×50 = 6000$;
16.$700÷14=700÷(7×2)=100÷2 = 50$(将$14$拆分为$7×2$);
17.$0.7 - 0.36=0.34$;
18.$485 - 395=90$;
19.$180×30 = 5400$;
20.$614 - 195=614-(200 - 5)=614 - 200+5=414 + 5=419$;
21.$302+108 = 410$;
22.$0.17+0.8 = 0.97$;
23.$833+169 = 1002$;
24.$1000 - 285=715$;
25.$120×7 = 840$;
26.$75×50 = 3750$;
27.$25×48=25×(40 + 8)=25×40+25×8=1000+200=1200$(将$48$拆分为$40 + 8$);
28.$580 - 121=459$;
29.$580×20 = 11600$;
30.$70×78=70×(80 - 2)=70×80-70×2=5600 - 140=5460$(将$78$拆分为$80 - 2$);
31.$330+180 = 510$;
32.$3.71+0.29 = 4$;
33.$250+150 = 400$;
34.$50 - 8.3=41.7$;
35.$140×9 = 1260$;
36.$660÷60 = 11$;
37.$240÷48=240÷(24×2)=10÷2 = 5$(将$48$拆分为$24×2$);
38.$584 - 125=459$;
39.$0.36 - 0.19=0.17$;
40.$90×35=3150$;
41.$312+108 = 420$;
42.$50×170 = 8500$;
43.$48×50=2400$;
44.$500 - 189=311$;
45.$625 - 285=340$;
46.$718+182 = 900$;
47.$960÷8 = 120$;
48.$306÷6 = 51$;
49.$60÷2÷5=60÷(2×5)=60÷10 = 6$;
50.$530 - 350=180$;
51.$841 - 148=693$;
52.$56 - 37 - 13=56-(37 + 13)=56 - 50=6$;
53.$640÷80 = 8$;
54.$6400÷80=80$。