直接写得数。42×2= 66÷3= 15×4= &n

1. (2019三上·武城期末) 直接写得数。
42×2=    66÷3=    15×4=   80÷8=          5×40=
100÷5=       4×300=       140÷2=       60×9=         202×6≈
640÷8=    320÷4=      16×4=       300÷6=         389×2≈
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1. (2019三上·武城期末) 直接写得数。42×2= 66÷3= 15×4= 80÷8= 5×40=100÷5= 4×300= 140÷2= 60×9= 202×6≈640÷8= 320÷4= 16×4= 300÷6= 389×2≈ + = - = + = - = + =