减,乘,除)记住是口算!
1个回答

120×2=

90÷30=

270÷30=

270×30=

84÷21=

76÷9=

66÷7=

100-54=

123+15=

360÷4=

55÷5=

32×6= 7000÷70=

200÷40=

180÷30=

240÷40=

35×2=

140×7=

13×6=

280×3=

350×2=

50×11=

250×6=

7200+900=

410-201=

125×8=

48×20=

6600÷600=

390+140=

11×80=

24×50=

3600÷400= 4000÷50=

530-70=

420-90=

9600÷30=

7×700=

203+98=

1800÷300=

240+570=

4800÷400=

370+580=

580-490=

910-370=

25×8=

270-190=

36×2=

75÷25=

330÷11=

6×800=

5400÷9=

420÷60= 9×800=

3×330=

300×7=

9×500=

390÷13=

6300÷700=

5600÷700=

4800÷12=

3500÷7=

370+560=

520+490=

450-90=

80+330=

70×700=

7000÷70=

4000÷80=

2400÷200=

420-90=

170+320=

1000-51= 520-260=

910-190=

35×200=

22×200=

8800÷400=

9300÷300=

6×300=

25 -15 -80 =

26 -6 -64 =

27 + 3 -48 =

28 + 12 -32

29 + 21 -16 =

30 + 30 + 0 =

31 + 39 + 16 =

32 + 48 + 32 =

33 + 57 + 48 =

34 + 66 + 64 =

35 + 75 + 80 =

36 + 84 + 96 =

37 + 93 + 112 =

38 + 102 + 128 =

39 + 111 + 144 =

40 -30 -140 =

41 -21 -124 =

42 -12 -108 =

43 -3 -92 =

44 + 6 -76 =

45 + 15 -60 =

46 + 24 -44 =

47 + 33 -28 =

48 + 42 -12 =

49 + 51 + 4 =

50 + 60 + 20 =

51 + 69 + 36 =

52 + 78 + 52 =

53 + 87 + 68 =

54 + 96 + 84 =

55 -45 -200

56 -36 -184 =

57 -27 -168 =

58 -18 -152 =

59 -9 -136

60 + 0 -120

61 + 9 -104

62 + 18 -88

63 + 27 -72 =

64 + 36 -56

65 + 45 -40 =

66 + 54 -24 =

67 + 63 -8 =

68 + 72 + 8 =

69 + 81 + 24

70 -60 -260

71 -51 -244 =

72 -42 -228 =

73 -33 -212 =

74 -24 -196 =

300*400=

120*500=

380+450=

520-360=

180+930=

7.2+2.8= 2.63+0.37= 2.5*0.4= 8-2.5

7.2+2.8=

12×2.5=

2.63+0.37=

0.7×16-16×0.2=

0.96÷0.3=

1.5-4.5=

2.5×0.4

1.4×2.5×4=

8-2.5=

6÷1.2=

9.2÷2.3=

24÷4+56÷4=

0.36+0.64=

4÷0.25=

1.8×5=

30×(200+3)=

8.4÷4.2=

8×1.5=

4.8÷0.3=

7.2+2.8= 2.63+0.37= 2.5*0.4= 8-2.5

7.2+2.8=

12×2.5=

2.63+0.37=

0.7×16-16×0.2=

0.96÷0.3=

1.5-4.5=

2.5×0.4

1.4×2.5×4=

8-2.5=

6÷1.2=

9.2÷2.3=

24÷4+56÷4=

0.36+0.64=

4÷0.25=

1.8×5=

30×(200+3)=

8.4÷4.2=

8×1.5=

4.8÷0.3=

2.73+1.5×4=

300*400=

120*500=

380+450=

520-360=

180+930=

300*45+300*55=