
8+2-8+2 25×4÷25×4 1 5 ×5÷ 1 5 ×5 26-0.75+0.25 7.26-(5.26-1.5)
8+2-8+225×4÷25×415×5÷15×526-0.75+0.257.26-(5.26-1.5)286+198314-202526+301223-996.25+3...
8+2-8+2 25×4÷25×4 1 5 ×5÷ 1 5 ×5 26-0.75+0.25 7.26-(5.26-1.5) 286+198 314-202 526+301 223-99 6.25+3.85-2.125+3.875 9-24÷56×21 98×58+58+58.
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(1)8+2-8+2, =10-8+2, =2+2, =4; (2)25×4÷25×4, =100÷25×4, =4×4, =16; (3)
=1÷
=5×5, =25; (4)26-0.75+0.25, =25.25+0.25, =25.5; (5)7.26-(5.26-1.5), =7.26-5.26+1.5, =22+1.5, =23.5; (6)286+198, =286+200-2, =486-2, =484; (7)314-202, =314-200-2, =114-2, =112; (8)526+301, =526+300+1, =826+1, =827; (9)223-99, =223-100+1, =123+1, =124; (10)6.25+3.85-2.125+3.875, =10.1-2.125+3.875, =7.975+3.875, =11.85; (11)9-24÷56×21, =9-
=9-9, =0; (12)98×58+58+58, =(98+1+1)×58, =100×58, =5800. |
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