问题
解答题
8.4÷2.5+8.4÷7.5﹦8.4÷(2.5+7.5)______(判断对错)
答案
8.4÷2.5+8.4÷7.5,
=3.36+1.12,
=4.48;
8.4÷(2.5+7.5),
=8.4÷10,
=0.84;
4.84≠0.84,
因此8.4÷2.5+8.4÷7.5≠8.4÷(2.5+7.5).
故答案为:×.
8.4÷2.5+8.4÷7.5﹦8.4÷(2.5+7.5)______(判断对错)
8.4÷2.5+8.4÷7.5,
=3.36+1.12,
=4.48;
8.4÷(2.5+7.5),
=8.4÷10,
=0.84;
4.84≠0.84,
因此8.4÷2.5+8.4÷7.5≠8.4÷(2.5+7.5).
故答案为:×.