问题
解答题
脱式计算.
355×4-809
8×(507-259)
156×9÷4.
答案
(1)355×4-809,
=1420-809,
=611;
(2)8×(507-259),
=8×248,
=1984;
(3)156×9÷4,
=156÷4×9,
=36×9,
=324.
脱式计算.
355×4-809
8×(507-259)
156×9÷4.
(1)355×4-809,
=1420-809,
=611;
(2)8×(507-259),
=8×248,
=1984;
(3)156×9÷4,
=156÷4×9,
=36×9,
=324.