看分数,涂颜色.
能简算的要简算①9﹣0.64﹣0.36②1.8×+2.2×25%③6.25﹣40÷16×2.5.
用简便方法计算.(1)2.25×4.8+77.5×0.48 (2)6.68﹣3.25﹣1.75.
12.56﹣6.64﹣3.36 45.5﹣(0.98+5.5) 6+7.94+6.4 3.75×4.8+62.5×0.48.
123.4÷4÷25 48×25 5.8×101 1.2×25×4 46×6.8+6.8×54 99×7.9+7.9 101×0.38﹣0.38.
脱式计算,能简算的要简算.①67.5×0.52+3.25×5.2 ②36×(+) ③42÷(÷) ④3.5×[(702﹣270)÷16].