一、口算。
$2×23=$ $3×20=$ $22×2=$
$10×2=$ $30×3=$ $21×4=$
$22×3=$ $3×12=$ $32×2=$
$20×2=$ $40×2=$ $2×30=$
$11×2=$ $12×4=$ $11×8=$
$22×4=$ $13×2=$ $2×41=$
$33×3=$ $20×4=$ $11×4=$
$2×14=$ $3×11=$ $24×2=$
$23×3=$ $21×2=$ $3×10=$
$34×2=$ $10×7=$ $12×2=$
$2×23=$ $3×20=$ $22×2=$
$10×2=$ $30×3=$ $21×4=$
$22×3=$ $3×12=$ $32×2=$
$20×2=$ $40×2=$ $2×30=$
$11×2=$ $12×4=$ $11×8=$
$22×4=$ $13×2=$ $2×41=$
$33×3=$ $20×4=$ $11×4=$
$2×14=$ $3×11=$ $24×2=$
$23×3=$ $21×2=$ $3×10=$
$34×2=$ $10×7=$ $12×2=$
答案
$2×23=46$,$3×20=60$,$22×2=44$
$10×2=20$,$30×3=90$,$21×4=84$
$22×3=66$,$3×12=36$,$32×2=64$
$20×2=40$,$40×2=80$,$2×30=60$
$11×2=22$,$12×4=48$,$11×8=88$
$22×4=88$,$13×2=26$,$2×41=82$
$33×3=99$,$20×4=80$,$11×4=44$
$2×14=28$,$3×11=33$,$24×2=48$
$23×3=69$,$21×2=42$,$3×10=30$
$34×2=68$,$10×7=70$,$12×2=24$
$10×2=20$,$30×3=90$,$21×4=84$
$22×3=66$,$3×12=36$,$32×2=64$
$20×2=40$,$40×2=80$,$2×30=60$
$11×2=22$,$12×4=48$,$11×8=88$
$22×4=88$,$13×2=26$,$2×41=82$
$33×3=99$,$20×4=80$,$11×4=44$
$2×14=28$,$3×11=33$,$24×2=48$
$23×3=69$,$21×2=42$,$3×10=30$
$34×2=68$,$10×7=70$,$12×2=24$
二、在$◯$里填“>”“<”或“=”。
$40×2◯90$ $30×2◯5×11$ $9×10◯11×8$
$2×23◯36$ $3×33◯11×9$ $5×11◯2×31$
$2×43◯80$ $6×11◯10×7$ $4×12◯14×2$
$3×31◯88$ $20×4◯8×10$ $6×11◯2×33$
$10×5◯44$ $4×21◯32×2$ $4×22◯44×2$
$40×2◯90$ $30×2◯5×11$ $9×10◯11×8$
$2×23◯36$ $3×33◯11×9$ $5×11◯2×31$
$2×43◯80$ $6×11◯10×7$ $4×12◯14×2$
$3×31◯88$ $20×4◯8×10$ $6×11◯2×33$
$10×5◯44$ $4×21◯32×2$ $4×22◯44×2$
答案
二、< > >
> = <
> < >
> = =
> > =
> = <
> < >
> = =
> > =
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