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
19 + 20 = ______
80 + 10 = ______
2 × 10 = ______
1 × 10 = ______
87 − 10 = ______
29 − 10 = ______
81 + 20 = ______
83 − 10 = ______
82 + 10 = ______
6 × 10 = ______
21 − 10 = ______
31 + 20 = ______
41 + 10 = ______
30 + 10 = ______
69 + 20 = ______
22 − 10 = ______
35 + 10 = ______
73 + 10 = ______
28 + 20 = ______
75 + 20 = ______
