tolong di jawab besok di kumpul

a. 427 + 1.289 + 578 = 427 + 578 + 1.289
= (427+578)+1.289
= 1005 + 1.289
=1.294
b.1.250 + 248 + 750 = 1.250+750+248
=(1.250+750) + 248
= 2000+248
= 2248
c.4×23×25 = 4×25×23
=(4×25)×23
=100×23
=2300
d. 8 × 7 × 125 =



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