《2025年灵机一动小学数学口算心算三年级上册苏教版》

口算练习 37
$159÷2\approx$80$31÷5\approx$6$298÷5\approx$60$212÷7\approx$30$50÷5=$10$150÷3=$50$20÷5=$4$14÷7=$2$25÷5=$5$250÷5=$50$63÷9=$7$630÷9=$70$64÷8=$8$640÷8=$80
2
$180÷3=$60
$81÷9=$9
$120÷6=$20
$240÷4=$60
$16÷4=$4
$160÷4=$40
$280÷4=$70
$720÷9=$80
$120÷5=$24
$40÷5=$8
$400÷5=$80
$36÷4=$9
$360÷4=$90
$100÷2=$50
3
$42÷7=$6
$420÷7=$60
$12÷3=$4
$18÷6=$3
$90×6=$540
$540÷6=$90
$240÷8=$30
$49÷7=$7
$490÷7=$70
$32×3=$96
$90÷3=$30
$360÷4=$90
$270÷3=$90
$720÷8=$90

答案： $159÷2\approx80$
$31÷5\approx6$
$298÷5\approx60$
$212÷7\approx30$
$50÷5=10$
$150÷3=50$
$20÷5=4$
$14÷7=2$
$25÷5=5$
$250÷5=50$
$63÷9=7$
$630÷9=70$
$64÷8=8$
$640÷8=80$
$180÷3=60$
$81÷9=9$
$120÷6=20$
$240÷4=60$
$16÷4=4$
$160÷4=40$
$280÷4=70$
$720÷9=80$
$120÷5=24$
$40÷5=8$
$400÷5=80$
$36÷4=9$
$360÷4=90$
$100÷2=50$
$42÷7=6$
$420÷7=60$
$12÷3=4$
$18÷6=3$
$90×6=540$
$540÷6=90$
$240÷8=30$
$49÷7=7$
$490÷7=70$
$32×3=96$
$90÷3=30$
$360÷4=90$
$270÷3=90$
$720÷8=90$