Matching Pairs Cálculo mentalOnline version Cálculo mental suma y resta by M. ELIZABETH COLCHA TOAPANTA 1 380 + 50 +95 = 2 700 – 90 + 55 = 3 790 + 60 – 100 = 4 400 + 40 – 250 = 5 310 + 50 – 90 = 6 15 + 800 – 25 = 190 525 790 270 655 750