问题
解答题
(1)4.97×5.98+4.97×4.02
(2)43.89-8.64-3.89.
答案
(1)4.97×5.98+4.97×4.02
=4.97×(5.98+4.02)
=4.97×10
=49.7;
(2)43.89-8.64-3.89
=(43.89-3.89)-8.64
=40-8.64
=31.36.
(1)4.97×5.98+4.97×4.02
(2)43.89-8.64-3.89.
(1)4.97×5.98+4.97×4.02
=4.97×(5.98+4.02)
=4.97×10
=49.7;
(2)43.89-8.64-3.89
=(43.89-3.89)-8.64
=40-8.64
=31.36.