417 Р°р»рірµр±сђр° 7 Рєр»р°сѓсѓ Рґрѕсђрѕс„рµрµрі Apr 2026

256+54=256+(50+4)=256+50+4=306+4=310256 plus 54 equals 256 plus open paren 50 plus 4 close paren equals 256 plus 50 plus 4 equals 306 plus 4 equals 310 2. Commutative Property and Subtraction Method :

138+106=106+138=106+(140−2)=106+140−2=246−2=244138 plus 106 equals 106 plus 138 equals 106 plus open paren 140 minus 2 close paren equals 106 plus 140 minus 2 equals 246 minus 2 equals 244 3. Subtraction by Rounding Up : Technique : Round and add the difference back ( Step-by-step :

This exercise asks to write a chain of numerical equalities using specific mental calculation techniques. 1. Addition of a Two-Digit Number : Technique : Break the second number into tens and units ( Step-by-step :