问题
解答题
口算
|
答案
120÷6=20, | 30×10=300, | 3000÷5=600, | 300÷3=100, | 69÷3=23, |
2000÷4=500, | 550÷5=110, | 15×6=90, | 53×20=1060, | 700×60=4200, |
134÷7≈20, | 92×78≈7200, | 42×39≈1600, | 570÷8≈70, | 491÷4≈125, |
口算
|
120÷6=20, | 30×10=300, | 3000÷5=600, | 300÷3=100, | 69÷3=23, |
2000÷4=500, | 550÷5=110, | 15×6=90, | 53×20=1060, | 700×60=4200, |
134÷7≈20, | 92×78≈7200, | 42×39≈1600, | 570÷8≈70, | 491÷4≈125, |