6854-(893+854+107) (8300-6500)÷(15×60) 28×19×25 327×99 54000÷8÷125 (105×46-2427)÷27.
(1)6854-(893+854+107), =6854-854-(893+107), =6000-1000, =5000; (2)(8300-6500)÷(15×60), =1800÷900, =2; (3)28×19×25, =4×7×19×25, =(4×25)×(7×19), =100×133, =13300; (4)327×99, =327×(100-1), =327×100-327×1, =32700-327, =32373; (5)54000÷8÷125, =54000÷(8×125), =54000÷1000, =54; (6)(105×46-2427)÷27, =(4830-2427)÷27, =2403÷27, =89. |
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