填一填.
(1)138÷7≈______
想:l38≈______
______÷______=______
(2)185÷2≈______
想:l85≈______
______÷______=______.
(1)138÷7≈20
想:l38≈140,
140÷7=20;
(2)185÷2≈100,
想:l85≈200,
200÷2=100;
故答案为:20,140,140,7,20;100,200,200,2,100.
填一填.
(1)138÷7≈______
想:l38≈______
______÷______=______
(2)185÷2≈______
想:l85≈______
______÷______=______.
(1)138÷7≈20
想:l38≈140,
140÷7=20;
(2)185÷2≈100,
想:l85≈200,
200÷2=100;
故答案为:20,140,140,7,20;100,200,200,2,100.