一口算：80×10 = 60 700×20 = 5090×90 = 4090×50 = 8011×70 = 6040×90= 2360×90= 3120×70= 80 40×30 = 6022×30= 2090×80 = 3340×70 = 7018×30= 1116×30= 7011×44= 7018 × 88 =44 × 55 =31 × 60 =79 × 26 =
×20= 50×60= 22×80 = 12×20 = 200×60= 50×20= 70×20= 20×50 = 40×80= 90×90= 12×30= 70×20 = 12×60 = 800×70 = 33×5 = 8023 × 55 =22 × 14 =73 × 54 =97 × 75 =
×40= 24×30= 80×200= 40×40= 12×30= 60×70= 30×50= 50×60= 11×70 = 43×40 = 80×60= 500×50= 32×20 = 30×30 = 80×4 = 3093 × 14 =91 × 69 =67 × 37 =35 × 35 =
×10 = ×70= ×40= ×30= ×300 = ×80 = ×50= ×40= ×20 = ×60 = ×30= ×200= ×15= ×80= ×50=
88 × 67 =61 × 55 = 25 × 31 =17 x 15 =
1
15x16= 18x21 = 33 x 32 = 21 x 35 = 32×30= 40= 40×5= 21= 120×3= 40= 30×13= 0= 30×23= 2=
11×50= 57—19=
37+8= 90÷3= 630÷3= 8×50= ×50= ＋20=
40×50= ÷2=
20×
40×25×
×24÷2
60 12 400 62
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