Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
71 + 20 = ______
2 × 10 = ______
82 + 10 = ______
86 − 10 = ______
24 − 10 = ______
47 + 10 = ______
76 + 10 = ______
4 × 10 = ______
56 − 10 = ______
75 + 20 = ______
7 × 10 = ______
49 − 10 = ______
54 + 20 = ______
74 + 20 = ______
77 + 20 = ______
5 × 10 = ______
16 + 20 = ______
6 × 10 = ______
36 − 10 = ______
24 + 20 = ______
