①1300÷26+24②③0.9×99+0.9④1.25×0.25×32⑤⑥.
网友回答
解:①1300÷26+24,
=50+24,
=74;
②,
=+,
=;
③0.9×99+0.9,
=0.9×(99+1),
=0.9×100,
=90;
④1.25×0.25×32,
=1.25×0.25×4×8,
=(1.25×8)×(0.25×4),
=10×1,
=10;
⑤,
=××,
=×,
=;
⑥,
=-×,
=-,
=.
解析分析:①先算除法,再算加法;
②先算除法,再算加法;
③运用乘法分配律简算;
④先把32分解成4×8,然后运用乘法结合律简算;
⑤先算小括号里面的加法,再算括号外的乘法,最后算括号外的除法;
⑥先算小括号里面的减法,再算括号外的除法,最后算括号外的减法.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.