问题
填空题
38+27=______,32+18=______,90-37=______
61÷3=______,75÷5=______,87-19=______.
答案
38+27=≈70,32+18=50,90-37=≈50
61÷3=≈20,75÷5=15,87-19≈70.
38+27=______,32+18=______,90-37=______
61÷3=______,75÷5=______,87-19=______.
38+27=≈70,32+18=50,90-37=≈50
61÷3=≈20,75÷5=15,87-19≈70.