直接写得数×2.8 =0.75+ ===0.25×23×4=99×+× 99=14.7-4.07=4×÷4×=

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$\text{[math]}$ ×2.8 =	0.75+ $\text{[math]}$ =	$\text{[math]}$ =	$\text{[math]}$ =
0.25×23×4=	99× $\text{[math]}$ + $\text{[math]}$ × 99=	14.7-4.07=	4× $\text{[math]}$ ÷4× $\text{[math]}$ =

1. (2023六上·钱塘期末) 直接写得数×2.8 =0.75+ ===0.25×23×4=99×+× 99=14.7-4.07=4×÷4×=